Type-writing machine.



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ITED l ES NT DOLPHUS S. DENNIS, OF LAKEWOOD, OHIO, ASSIGNOR TO UNIDERWOOB TYPES/WRITER COMPANY, OF NEW YORK. N. Y., A CORPORATION 0F DELAWARE.

TYPLELWRITNG MACHINE.

Specification of Letters Patent.

Patented iipr. 1S, 31916.

Application led May 19, 1913. Serial No. 7623,429.

To all whom t may concern Be it knoWn that I, AnoLrHUs S. DENNIS, a citizen of the United States, residing in Lakewood, in the county of Cuyahoga and State of Ohio, have invented certain new and useful Improvements in Type-lVriting Machines, of which the following is a speci icat-ion.

My invention relates to typewriting machines, and especially to the mechanism for feeding work-sheets around the platen of machines having a platen carriage of the ordinary type.

Une of the several objects of the invention is to provide means whereby condensed billing may be accomplished. ln billing, the method lusually employed is to write out a lbill on a typewriter, and at the same time to make a carbon copy of the items on said bill on a ledger or other loose-leaf book. In doing this work, it effects va great economy of space to put the items on one bill immediately adjoining on a preceding bill without leaving the blank space on the carbon copy, which the billhead would ordinarily leave there. Thus it becomes desirable to provide means whereby a carbon copy may be held in position on the typewriter, while a bill, which has been written, is taken out of the typewriter, and a new bill is fed around to the printing point. For accomplishing this result, there may be provided two sets of feed rolls cooperating with the usual revolving platen; One set of said rolls runs -freely in the usual manner on the platen, and when the platen is at rest will hold any work-sheet at rest against said platen. The other set of feed rollslmay be arranged to bear lightly against the platen so that a second worksheet may be inserted by positively turning said second set of feed rolls, thus sliding the second work-sheet up to the printing point over the first worksheet without disturbing it. The second set of feed rolls, which feed the second worksheet, preferably includes endless belts, which belts engage said work-sheet over a consid erable portion of their reaches, and thus getd a strong frictional hold on the work-sheet, although they do not bear strongly enough against said worksheet to cause it to bind against the platen.

After a worksheet has been inserted by positively turning the belts just described, said belts are preferably thrown against the platen so that the two worksheets revolve together with the platen, until the necessary writing` has been done. rlhe belts may then be released so to relieve the friction between the work-sheet and the platen, and then said second work-sl'ieet may be carried along by the belts away from the printing line. During this time, however, the first set of feed rolls may hold the carbon copy fast to the platen, and said platen in the meantime is held against revolving by the usual line-spacing detent.

Another of the objects is to provide a smiple casting off mechanism for the usual feed rolls which hold a work-sheet against the platen.

Another object of the invention is to provide means whereby, in making carbon copies .of sheets as they are written, the

s original and the copy may be line'spaced or advanced differently. Thus in such work, for example, as bookkeeping, an original or bill placed on the typewriting machine may receive the items on the bill or other worksheet, while aloose ledger leaf also inserted in the typewriting machine receives r. carbon copy of said bill. lt is desirable in this class of work to economize space as mash as possible on the lcopies which are kept usually in the form of lpseleaf books, while at the same time it is desirable to make a bill which shall be attractive looking. To do this, it is frequently desirable to space the lines on the bill, which is sent to the customer, at a considerable distance from each other, while the lines on the loose leaf may be spacedclosely to each other. To obtain such a result, this invention may include means whereby one work-sheet (preferably that forming the carbon copy) revolves with the platen at the speed of the platen, while another work-sheet (preferably the original To this platen. The result is that the outer worksheet will slip on the inner and be fed along by the feed rolls which engage it at the speed with which said'feed rolls turn, where- 1 cfu-1 as the other work-sheet is carried along by the platen at the speed of the platen.

Preferably the mechanism is so Constructed that the turning of the platen pos1- tively drives one set of feed rolls, with the result that whether the platen is turned by the line-space mechanism or by the usual knobs on the axle, the relative speed of the feed rolls and the platen is positively controlled. Preferably there is interposed in this driving connection a clutch, and when said clutch is released, the feed rolls `revolve freely and may be turned by thel work-sheet which they hold against the platen in the usual manner.

Other features and advantages will here inafter appear.

In the accompanying drawings, Figure 1 is a perspective view with some parts broken away and removed of an Underwood typewriting machine paper carriage, showing my invention as applied thereto. Fig. 2 is a section through the right-hand end of Fig. l. Fig. 3 is an end view partly diagrammatic looking from the left-hand end of Fig. 1. -Fig. 4 is a sectional view showing two work-sheets and a carbon sheet clamped in place against the platen. Fig. 5 is a similar view showing the rolls cast olf which engage the outer work-sheet- Fig. 6 is a View showing diagranimatically the path of the work-sheets around the platen. Fig. 7 is a detailof the gearing between the platen and its feed rolls.

The platen frame which may be shiftfable in the usual manner to upper and lowercase positions on the carriage, comprises the usual paper-shelf 1 having ends 2 and 3 in which is journaled in the usual manner a platen 4 having an axle 5 to which it is fast, and having at each end thereof, the usual knob 6 by which it may be turned. Said platen frame also includes front and rear feed rolls 7, 8 which may be east off in a manner described later by means of a 1inger-piece v9, land when so cast off, a worksheet 10 may be inserted around the platen.

riihe shelf 1 includes tongues 11 by which the work-sheet is guided up -onto the feed rolls 7, 8, so that the paper passeslaeneath the platen and up at the front thereof to the printing line. .l

lTn addition to the usual front and rear feed rolls, the present disclosure includes supplementary feed rolls 12 which bear on 'the platen at the rear lthereof at a little distance above the paper-shelf, and said feed rolls 12 are mounted on a shaft 13 which is carried on ariins 14, said arms being pivotally mounted on a shaft 15; said shaft 15 being supported at one end bv a joint 16 so that it may be released from the catch 17 normally holdingit at the opposite end, and then swung upwardly and away from the platen. When so swung, a work-sheet 18 may be passed easily between said rolls and the platen and down under the platen, so that it follows the path of the worksheet 10 when beneath the platen. There is usually inserted with this work-sheet 18, a sheet of carbon paper 19 which likewise passes between the rolls 12 and the platen 4; and both said carbon paper 19 and work-sheet 18 are held clamped against the platen by means of coil springs 2O which encircle the shaft 15 and cause the rolls 12 to engage the platen with considerable pressure. The connections for casting off the rolls 7, 8, so as to enable work-sheets to be thus inserted around the platen, include a link 21 extending from the finger-piece 9 to a rock arm 22 fast on a cam shaft 23, which cam shaft is arranged to positively move the rolls 7, 8 away from the platen. Said rolls are normally held against the platen by means of leaf springs 24 which bear against a bar 25 at the bottom of the platen frame. On said bar 25 are journals or straps 26 in which the cam shaft 23 is so mounted as to have considerable play. When the finger-piece 9 is in its normal position,`as shown in Figs. l, 3 and 4, the cam shaft 23 stands with a flat face 27 uppermost. Said face is at the point where. the journals 26 engage said shaft; and thus this flat surface 27 gives the` springs 24 complete freedom to press the rolls 7, 8 against the platen. To bring about such pressure of the rolls, said rolls are carried onY yokes 28 Ajournaled on the cam shaft 23.

The feed rolls 7, 8 are each respectively fast on the shafts 29, 30 by which they are carried, which shafts are journaled in the yokes 28. The rear feed rolls 8 may be positively driven by means of a knob 31 slidably splined at 32 on a loose sleeve 33 extending through the end 3 of the platen frame. When said knob 31 is turned, it turns with it a gear wheel 34 fast on the sleeve 33, said gear Wheel meshing with a'pinion 35, which pinion turns the shaft 30 on which vare the rear feed rolls 8, by means of ashort shaft 36 having a universal joint 37 atreach end thereof. The pinion isjournaled on aj stud 33, said stud being mounted on an eX- tension 39 of the end 3,015 the platen frame. The rear roll shaft 30 is journaled on the yokes 28 by means of cone ball-bearings 40 at each end thereof, so that said ball-bearings hold said shaft against moving in either direction longitudinally.

A spring 44 normally thrusts the knob 31 to the right, as viewed inf'Figs. 1 and 2, so that a clutch member 45 thereon engages a clutch member 46 fast on the usual knob 6. When said clutch members thus engage, the two knobs 6 and 31 revolve together, and the rear feed roll shaft 30 is positively driven by means of the gear Wheel 34 whenever the platen turns. The clutch 45, 46 may be held released by a yoke ,41,11 forming an extension of a fingenpiece airiounted at 43 on the end 3 of the platen fran'er said yoke entering a slot 63 on the clutch member l5. Said clutch is preferably so arranged that the teeth on the members correspond with the teeth of the line-space ratchet Wheel (i5, so that the clutch when engaged alines the work-sheets with the line-spacing of the ratchet wheel (35.

The front feed rolls 7 are driven from the rear feed rolls 8 by means of belts 4T in the form of endless rubber bands which embrace pulleys 48 fast on the two roll shafts. Said belts and rolls are so arranged that when the rolls are east olf, as seen at Fig. 5, the belts 4-7 bear against the platen l with a. little friction, so that if the knob 31 is turned with the parts positioned, as shown in, Fig. 5, the outer Worksheet 10' will be moved along by the belts 47 which engage it, but the friction between said work-sheet and the carbon paper 19 is insufficient to move said carbon paper or the other work-sheet 18. From this, it will be seen that the carbon, paper 19 and Work-sheet 18 are locked in position against the platen and that the platen remains stationary, being held by the usual spring detent roll 49 against revolving, but the outer sheet in the meantime can be moved by the knob 31 to any desired position.

The outer Worksheet 10 may be driven at a different speed from the carbon paper 19,

and the inner Work-sheet 18 by means of the belts 4l. To do this, it is only necessary that the ratio of the diameters of the pinion 35 and gear Wheel 34 be different from the ratio of the eifective diameters of the feed rolls 8 and the platen 4. In the present instance, the ratios differ about as one is to two, so that if the platen is revolved in the ilsual manner by the line-spacing pawl 50 from the usual line-space bar 51, the outer work-sheet Will be moved by every such operation twice the distance that the inner Work-sheet is revolved; said inner worksheet being moved at the speed of the platen while the outer work-sheet is moved at the speed of the feed rolls 8. During this operf ation the feed rolls hold the inner worksheet 18 and its carbon 19 against the platen with sutlieient pressure to prevent them from slipping on the platen, so that the lll) outer sheet alone is fed forwardly at the surface speed of the .rolls 7 and 8 and the belts 17. 'lhe friction between the platen and the innerWork-sheet is also augmented by the pressure of the feed Arolls 7 and 8 and the beltsfl'?. lf desired, the rolls 7 and 8 may be held oil the platen (Fig. while the work-sheets are being driven at different speeds, so that the belts 47 alone drive the outer *vorlosheet 1D.

' The shaft l5, on which the supplementary rolls 12 are carried, is preventedfrom rov tating under the pressure of the springs 20 in thrusting the rolls 12 against the platen, because the joint 16 is formed by having a fairly large turned-up end 53 of a plate -l fast to the end 2 of the platen frame, which forms sort of a thrust member 'which lies in a slot in the enlarged end 55 of the shaft l5; and said end 53 is pivoted about centrally in said slot. At the other end of the shaft the catch 1T is formed as a turnedup plate 58 fast on the end 8, and the member 59 which actually engages said plate 5H is a crank-like extension of an arm G0 fast on the shaft 15. 1,

The springs are prevented from turning the rolls 12 far out of place by means of pins 56 which lie within cut-away portions of the rock arms 14.

It will be noted that the yokes 28 comprise extensions 61 which cooperate with the bar to form guides. for the yokes as they carry the rolls 7, 8 to and from the platen. An additional guide in the forni of a plate 62 may be fast to the bar 25 at a point intermediate the yokes 28, said plate eoperating with the shaft 29 of the front feed rolls.

The sleeve 33 may be held against end thrust by a ball-bearing of the double groove type fast on the platen frame end 3.

The relation of the worksheets to the feed rolls and platen is shown on an enlarged scale at Fig. 6,

As shown7 in Fig. 4, the outer Work-sheet may be fed forward at double speed with the clutch 45, 46 thrown in and the lingerpiece 9 holding the bottom rolls against the platen; but under some conditions, the ten sion of the belts L17 may be such that it is preferable to have the linger-piece 9 released when the double speed drive connections are thrown in by clutching to 46.

Variations may be resorted to Within the scope of the invention, and portions of the improvements may be used Without others.

Having thus described my invention, l claim:

l. In a typewriting machine, the combination with a rotatable platen, of a. feed roll, adapted to bear a Worksheet against said platen and rotate with the rotating platen, and adapted to be released therefrom, and a positively driven feed roll driven by the rotating platen; and operable to ,feed a. sheet over the platen eoncomitantly with said flrst-n'ientioned work-sheet but 'at a different speed, said positively driven roll'adapted to be released from said platen.

2. In a typeivriting machine, the combi` nation with a rotatable platen, of a feed rollA adapted to bear a. worksheet against said platen and rotate with the rotating platen and adapted to be released therefrom, a positively driven feed roll drivenby the rotating platen, said positively driven roll "adapted to be released from said platen, and

a clutch for connecting said positively driven roll to said platen.

3. In a typewriting machine, the combination with a rotatable platen and a roll adapted to hold a work-sheet thereagainst, of a belt adapted to hold a superposed work sheet against saidplaten, pulleys over which nation with a rotatable platen, of a feed roll for holding a work-sheet against said platen, means whereby said feed roll may be removed from said platen to disengage said work-sheet, another feed roll, and means for gearing said other feed roll to positively turn with the rotating platen and feed a second Work-sheet at a different speed from the surface speed of the platen.

5. In a typewriting machine, the combination with a rotatable platen and a roll adapted to hold a work-sheet thereagainst, of separate means for holding a suppressed work-sheet against said platen, means for Apositioning raid separate means so that it only slightly bears against said superposed work-sheet, and gearing for positively driving said separate means.

ln a typewriting machine, the combi* nation with a rotatable platen and means for holding a work-sheet thereagainst, of separate means for holding a work-sheet against said platen, and gearing for positively driving said separate means by the rotating platen, said gearing comprising a clutch connecting one member of the gearing to the platen shaft.

7. In a typewriting machine, the combination with a rotatable platen and front and rear feed rolls therefor, of a yoke on -which said feed rolls are carried, a bar adjacent said platen, guides on said yoke coperating with said bar, a rock shaft mounted loosely in journals on said liar and underlying said yoke, a spring holding said shaft upward to press said rolls against said platen., said shaft being cut away at said journals to permit the rolls to be thus carried against the platen, and means for rocking said shaft to bring an uncutaway portion thereof against the journals to conipress said spring and allow the rolls to move away from the platen.

8. In a typewriting machine, the comloi nation with a rotatable platen and front and rear feed rolls therefor, of yokes on which said rolls are carried, a bar adjacent said platen, guides on said yokes coperating with said bar to hold the rolls in position, ay shaft underlying said'yokes, a strap extending from said bar around said shaft to form a journal for said shaft, and permitting said shaft which has al cutaway portion adjacent said strap to have therein, a` spring holding said shaft to hold the rolls against the platen, and means for nation with a. rotatable platen, of feed rolls therefor, a bar adjacent said platen, shafts on which said rolls are mounted, aV guide on said bar coperating with a shaft to guide the rolls as they move to and from the platen, yokes on which said shafts are journaled, a second shaft on which said yokes are journaled, journals on said har in which said last-named shaft has piay, a spring supporting said second shaft to hold said rolls against the platen, said last-named shaft comprising a flat cutaway portion at each journal, and means for rotating said shaft to bring uncutaway portions against the journals to permit said rolls to move away from the platen.

l0. ln a typewriting machine, the combi nation with a rotatable platen and a feed roll therefor, of a frame in which the platen is mounted, a paper table for guiding worksheet Onto said feed roll, a second feed roll above said paper table, a rod extending across said frame on which said second "oil is resiliently mounted so as to bear against the platen, and a hinge on wiiich said rod may be swung to carry said second roll clear of the platen to permit the insertion of a second work-sheet free of said second roll across said paper table, and then to permit said roll to be swung to position to hold said second work-sheet against the platen.

11. ln a ty])ewritingmachine, the .combination with a platen and a frame in which itis mounted, of a feed roll, a paper tanle for guiding a work-sheet onto said feed roll, a second feed roll above said paper table, a swinging rod journaled in said e frame, rock arms on said rod., a shaft journaled in said arms and on which said second roll is mounted` a spring for rocking said arms to hold said second roll against the platen, and a catch holding said rod in position to hold said second roll against the platen.

l2. In a typewriting machine, the combination with a rotatable platen and feed y rolls therefor, of means for positively driving said feed rolls, means for moving said rolls so that they bear tight against the platen or are clear of said platen lout tend to cause a work-sheet to travel with them, another set of feed rolls, means for locking said other set of feed rolls to bear against said platen` and a` detent for holding the platen against revolving while said iirstnamed feed rolls are positively driven.

13. rThe combination with a rotatable medew bbination with a rotatable platen, of a removable feedroll for causing a work-sheet i to feed with the rotating platen, and a separate device pressing against the platen for causing a work-sheet to feed around the platen at a diderent speed from that at which the platen is moving.

l5. ln a typewriting machine, the `combination. with a rotatable platen, of a removable feed roll for causing a work-sheet to feed with the rotating platen, and a separate device pressing against the platen for causing a work-sheet to feed around the platen at a different speed from that at which the platen is moving, said vsecond means movable to lock a Work-sheet to move with the platen.

16. In a typewriting machine, the combination with`l a rotatable platen, of front and rear feed rolls for "said platen, a yoke on which said rolls are liournaled, a rock shaft carrying said yoke, a spring normally pressing said* shaft to hold said rolls against the platen, (bearings for the rock shaft, said shaft having portions within said bearings cut away so that when the cutaway portions face the platen the spring presses the shaft to carry the rolls against the platen, but when the round portions of said shaft Within said bearings face the platen the yoke is free to drop away from the platen, and means for vrotating said shaft.

17. ina typewriting machine, the combination with a lrotatable platen and feed rolls therefor, of driving means comprising a clutch and gearing between said platen and said rolls for causing said rolls to be positively' driven by the rotating platen, means for holding` said rolls against the platen and operable to permit the rolls to move from the platen, so that they either hold a worksheet positively against it or only slightly engage a work-sheet so that they' have ay tendency to cause a worksheet to travel with them, another set of feed rolls removably bearing against the platen, and a detent for detaining said platen against revolving, and thereby holding one Work-sheet stationary on the platen while another sheet is being fed by said firstmentioned rolls.

i8. In a typewriting machine, the combination with a rotatable platen, of belts for tti holding a work-sheet against said platen, means to drive the belts, means for moving said belts so that they hold a worksheet tight against the platen or only slightly engage a work-sheet, separate feed rolls for holding a work-sheet against the platen, and a detent for detaining the platen, and thereby holding one work-sheet stationary between the platen and said separate feed ols while another work-sheet is fed by the e ts.

19. The combination with a roller platen of a typewriting machine, of feed rolls bearing on the platen and coperating with the 5 platen to feed a work-sheet, other feed rolls movable to and from the platen, and means to drive said last-mentioned'feed rolls either with or separately from the platen, said last-mentioned rolls arranged to feed, relatively to said Worksheet, aysecond Worksheet on the platen overlying the first-mentioned work-sheet.

20, n a typewriting machine, the combination with a revoluble platen, of'a feed roll for holding av work-sheet against the platen and causing it to be fed forwardly at the surface speed of the platen When the latter is rotated, additional sheet feeding means to hold a superposed-work-sheet against the platen and cause it to be fed 'forwardly at the surface speed ,of said means, means for holding the platen against rotation, and therebyholding the first work-sheet stationary while the superposed sheet is fed forwardly, and gearing between the platen and said sheet feeding means for operating the latter when the platen is rotated, and thereby causing the outer sheet to be fed at a different speed from that of the inner sheet, said gearingv comprising a clutch for disconnecting the' said feeding means from the platen and permitting the outer' sheet to be fed by said sheet feeding means independentlyof the inner sheet.

2l. In a typewriting machine, the com` bination with a revoluble platen, of a feed roll for holding al work-sheet against theplaten and causing it to be fed forwardly at the surface speed of the platen whenthe latter is rotated, -additional sheet-feeding means to hold a superposed work-sheet againstthe platen and cause it to befed forwardly at the surface speed of said means, and means for holding the platen against rotation, and thereby holding the 4first work-sheet stationary while the super-v posed sheet is fed forwardly by its feeding means. y

22. In a typewriting machine, the combination with a revoluble platen, of sheetfeeding and holding means for holding a work-sheet against the platen and causing it to be fed forwardly at the surface speed of the platen when thev latter is rotated, additional sheet-feeding means to hold a super-posed Work-sheet against the platen independently of said first-mentioned means and cause. said superposed sheet to be fed forwardly at the surface speed of said additional feeding means, and gearing between the platen and said second-mentioned sheet feeding means for drivin the latter when the platenv is rotated, an the outer sheet to be fed at a different speed from that of the inner sheet, said gearing comprising a clutch for disconnecting the said second-mentioned feeding means from the platen and permitting the outer sheet to be fed independently of the inner sheet.

23. In a typewriting machine, the Combination with a revoluble platen, of a feed roll for holding a Work-sheet against the platen and causing it to be fed forwardly at the surface speed of the platen when the latter is rotated, additional sheet feeding means to hold a superposed work-sheet against the platen independently of said feed roll and cause said superposed sheet to be fed forwardly at the surface speed of said means,

and gearing between the platen and said sheet feeding means for driving the latter when the platen is rotated, and thereby cansing the outer sheet to be fed at a-dil'erent speed from that of the inner sheet.

24, In a typewriting machine, the combination With a revoluble platen, of a feed roll for holding a work-sheet against the platen, work-sheet feeding means separate from said feed roll for holding a second work-sheet against the platen, and means to drive said sheet-feeding means when the platen is rotated but at a different surface speed from that of' the platen, whereby the said work-sheets are simultaneously fed over the platen but at different speeds.

25. In a typewriting machine, the combination with a revolnble platen, of a feed roll forfholdinga work-sheet against` the platen, Work-sheet` feeding means separate from said feed rroll'r forr holding a second worksheet against the platen, means to drive said sheet-feeding means when the platen is rotated but at a different surfaee speed from that of the platen, whereby the said worksheets are sinmltaneously fed over the platen but at different speeds; said sheet-feeding means also operable while the platen is at rest, and means to hold the platen against rotation, whereby one sheet may be fed while the other is held stationary on the platen.

26. In a typewriting machine, the combination with a revoluble platen, of sheetfeeding and holding means for holding work-sheets against the platen and feeding them over the platen, a driving connection between the platen and said feeding means ,comprising gearmg for operatxngsnid feeding means to feed work-sheets'at a different speed from the surface speed of the platen When the latter is rotated, saidgearing comthereby causing memoria 2T. In a typewriting machine, the eombination with a revolnble platen. of sheet-feeding and holding means for holding worksheets against the platen and feeding them over the platen, and a driving connection between the platen and said feeding means comprising gearing for operating said feeding means to feed work-sheets at a different speed from the surface speed of the platen when the latter is rotated` said gearing comprising a clutch for breaking the said driving connectionA and permitting the worksheets to be fed directly by the platen at the surface speed of the platen.

28. In a typewriting machine, the combination with a revoluble platen, of sheetfeeding means, a hand wheel loosely mounted on the platen axle for-rotation thereon relatively to the platen, and gearing between said hand wheel and said sheet-feeding means for operating the latter b v said hand wheel when thus rotated.

29. ln a typewriting machine, the Combination with a revoluble platen, of sheetfeeding means, a hand wheel mounted on the platen axle'for rotation relatively to the platen. gearingbetween said hand wheel and said sheet-feeding means for operating the latter during said rotation of 'the hand wheel, and means to relea'sably connect said hand wheel to the platen to rotate therewith, whereby said sheet-feeding means is driven by said gearing when the platen is rotated.

30. ln a typewriting machine, the Combination with a revoluble platen, of sheetfeeding means.' a hand wheel mounted on the platen axle. gearing between said hand wheel and said sheet-feeding means for operating the latter. and means to releasably ronneet said hand wheel to the platen to rotate therewith, whereby said sheet-feeding means is driven b v said gearing when the platen is rotated; said gearing proportioned to operate. the sheet-feeding means at a different surfaee speed from that of the platenwhen said hand wheel is Connected to rotate with the platen, and thereby feed a sheet at a different surface speed from that of the rate feed roll for holding a second worksheet on the platen. and gearing between the platen and said second feed roll for operatof the platen as the latter is rotated, a sepaideama ing the latter at a different speed from that of the platen, whereby the work-sheets are simultaneously fed, but at different' speeds.

32. In a tylmwriting machine, the combination with a revoluble platen and a paper table, of a feed roll located above the paper table and bearing against the platen to feed a werk-sheet around the platen, and work-sheet feeding means in position to engage a Work-sheet placed on the paper table and feed the latter while the platen is stationary.

33. In a typewriting machine, the combination with a revoluble platen and a paper table, of a feed roll located above the paper table and bearing against the platen to feed a work-sheet around the platen, and work-sheet feeding means tofeed a worksheet placed on said table, said means driven by the platen and operable tofeed a work-sheet over the platen when the platen is rotated at a different speed from that of the work-sheet held by the said feed roll.

34. In a typewriting machine, the combination with a revoluble platen and a paper table, of a feed roll located above the paper table to hold a work-sheet on the platen and cause it to be fed at the surface speed of the platen, and work-sheet feeding means to engage a work-sl'ieet supplied to the platen between the paper tableand said; 'feed' roll, said means operable to hold all the work-sheets against the platen and canse' them to be fed together atthe surface-speed of the platen, said feeding means also oper- `able 4to feed the outer work-sheet at a different speed from that of the inner worksheet.

35. In a typewriting machine, the combination with a revoluble platen, of sheetfeeding means to hold a number of superposed work-sheets on the platen and cause them to be fed forwardly with the platen, additional. means for holding the inner work-sheet on the platen, mechanism for reducing the. pressure of said feeding means on the 'werk-sheets, and means for operating the said feeding means while the pressure is thus reduced and Vwhile the inner work-sheet is held by said additional means, and thereby feeding the outer work-sheet over the l)laten relatively to 'the inner worksheet.

3b. The combination with a roller platen, of sheet-feeding means cooperating therewith to feed a sheet over the platen while the latter is stationary, said means arranged to bear against the outer face of the sheet while the platen forms a backing therefor to maintain the pressure of the sheet against the feeding means, thereby enabling the feeding means to advance the sheet over the stationary platen.

FST. The combination with a roller platen, of sheet-feeding means eoperating therewith to feed a sheet over the platen while the latter is stationary, said means arranged tobear against the outer face of the sheet while the platen forms a backing therefor to maintain the pressure of the sheet against the feeding means, 'thereby enabling the feeding means to advance the sheet over the stationary platen, said feeding means operable to hold the sheet on the platen while the latter is rotated, `and-cause the sheet to be'advanced with the platen at the surface speed thereof.

38. The combination with a platen, of means eoperating therewith to feed a sheet over the platen while the latter is stationary, said sheet-feeding means arranged to hear against the sheet while the platen forms a backing therefor to maintain pressure of the feeding means against the sheet, thereby enabling the said feeding means to advance the sheet over the platen, and gearing forming a releasable driving connection between the platen and the sheet-feeding means, said gearing operable to drive said feeding means from the platen when the latter is rotated.

39. The combination with'a platen, of means eoperating therewith to feed a sheet' over the platen while the latter is station- "ary, said sheet-feeding means arranged to 7,. bear against the sheet while the platen forms a backing therefor, to `maintain pressure of the feeding means agamst the sheet, thereby enabling the said feeding means to advance the sheet over the platen, gearing forming a releasable driving connection between the platen and the sheet-feeding means, said gearing operable to drive said feeding means from the platen when the latter 1s rotated, and feed said sheet at a" different speed' from the surface speed of the platen, and means cooperating with the platen to feed at the surface speed of the platen and 'eoneomitantly with the feeding of said sheet, a second sheet interposedbetween the rst-mentioned sheet and the platen. ,v

40. The combination' with slieet-feeding means, of a roller platen forming a backing for a sheet to be fed over the platen by said means, and holding the sheet np to the feeding means to permit an operative pressure of said means against the sheet to be maintained, said means operable to feed the sheet at 'a different surface speed from that of the platen.

l1. The combination with sheet-feeding means, of a roller platen forming a backing for a sheet to be fed over the platen by said means and holding the sheet np to the feeding means to permit an operative pressure of said means against the sheet to be maintained, said means operable to feed the sheet Iat a different surfaee speed from that of the platen, said feeding means also operable to hold the sheet against the platen while the platen is being rotated and cause the sheet to be fed with the platen at the surface speed thereof, said feeding means moving freely over the 'surface of the sheet topermit the sheet to feed with the platen.

4,2, The combination with sheet-feeding means, of a roller platen forming a backing for a sheet 'to be fed over the platen by said means and holding the sheet up to the lfeeding means to permit an operative pressure of said means against the sheet to be maintained, and a `gear train between the platen and said feeding means operable to drive the latter and feed the sheet at a different surface speed from that of the platen.

43. The combination. with sheet-feeding means, of a roller platen forming a backing for a sheet to be fed over the platen by said means and holding the sheet up to the feed ing means to permit an operative pressure of said means against the sheet to be maintained, a gear train betweenthe platen and said feeding means operable to drive the latter and feed the sheet at a different surface speed from that of the pla-ten, means for releasing the feeding means from the control of the platen through said driving train, and a manual device for actuating the feeding means to move the sheet in either direction over the platen while the latter is held stationary.

lll., lena typewriting machine, the combination ivitli a revoluble platen, of means to support a sheet thereon and feed it at the surface speed of the platen, means to hold a second sheet on the platen to be-fed at the surface speed thereof, and means brought into activity at will to cause the said second sheet-holding means to be driven by the platen and thereby feed they second sheet at a different surface speed from that of the platen whereby the sheets may be fed at the' same speed or at different speeds during any porti-on of the platen rotation.

4:7. The. combination with a revoluble platen, of means for holding a sheet thereon and causing it to he fed with the platen at the surface speed thereof, means to hold a second sheet on the platen to overlie the lrst-mentioned sheet and cause said second sheet to he fed at the surface speed ofthe platen when the latter is rotated, and means lli-ought into activity at will to cause said second sheet-holding means to be driven by the platen and thereby feed the second sheet at a different surface speedfrom that of the platen, whereby said sheets may be fed at will past the printing line either at the same speed or at a different speed, so that the linespacmg of any desired portions of the work Lismore may be made the same on bothsheets, and the linespaeing of other' portions of the work may be made difereut on the two sheets. i

46. ln a front-strike typewriting machine,

4'the combination with a revoluble platen and a paper table at the introductory Side of' 'the platen, of outer sheet-feeding means to bear against the platen between said table and tlie' printii1g line, the platen forming a backing for outer sheets to be fed over the platen by said means and holding the sheets against the feeding means to permit an operative pressure of said means against the `mit an outer sheet to be placed on the paper table and fed over the platen between the4 inner sheet and said outer sheet-feeding means, the latter operable to feed the outer sheet bothwhile the inner sheet and platen are held stationary vand also when the platen` is rotated.

47. In a front-strike typewriting machine, 9G

the combination with a revoluble platen and a paper table at the introductory side 0f the platen, of outer sheet-feeding means to bear against the platen between said table and the printing line,y the platen formingl a hacking for outer sheets to be fed over the platen by said means and holding the sheets against the feeding means to permit an opg erative pressure of lsaid means against the sheets tobe maintained.I an auxiliary sheetfeeding means located above the paper table and coperating with the platen to hold an inner sheet against the platen and cause it to he advanced at the surface speed of the platen when the latter is rotated, said auX- iliary feeding means positioned to permit an outer sheet to be placed on the paper table and fed over the platen between the inner sheetY and said outer sheet-feeding means. a manual device to drive said outer sheet-feeding means and feed the outer sheet over the platen while the inner sheet and platen are stationary, and means to cause the outer sheet-feeding means t0 be driven by the platen so that both the inner and outer sheets areadvanced when the platen is rotated.

' ADOLPHUS S. DENNIS.

Witnesses F, E. ALEXANDER, Trrns H. RONS. 

